The RD-170 engine is a 4 chamber liquid kerosene/liquid oxygen rocket
engine. It was designed during the 1970's to power the strap-on boosters of the Energia launch vehicle.

The RD-170 was used for the Energia Launch Vehicle and its cancelled derivative,
the Energia-M. The RD-170 is currently in use in the first stage of the Zenit
Rocket with is used by Sea Launch.

NPO Energomash markets this engine now.

Specifications:

Mass:
8755 kg

Length: 3.56m

Length: 3.56m

Propellants: Kerosene/Liquid Oxygen.

ISP: 336 Vacuum

Thrust: 7903 KN.

Why
build the RD-170?

Korolev's OKB-1 were the developers of the N-1 Moon Rocket of the 1960's.
Korolev died in 1966 and Mishin was his successor. Unfortunately, the N-1 had 4
failures and in 1974, Glushko became his successor. Glushko decided to build his
own kerosene/lox engines and did not want to use the N-1's Nk-33 engines.

Instead Glushko developed the RD-170. This engine is more powerful than the F-1
main engine used in the Saturn 5 Stage 1.